Contents

module Beryl
  module Utils
    extend self

    def constantize(camel_cased_word)
      names = camel_cased_word.split('::'.freeze)

      # Trigger a built-in NameError exception including the ill-formed constant in the message.
      Object.const_get(camel_cased_word) if names.empty?

      # Remove the first blank element in case of '::ClassName' notation.
      names.shift if names.size > 1 && names.first.empty?

      names.inject(Object) do |constant, name|
        if constant == Object
          constant.const_get(name)
        else
          candidate = constant.const_get(name)
          next candidate if constant.const_defined?(name, false)
          next candidate unless Object.const_defined?(name)

          # Go down the ancestors to check if it is owned directly. The check
          # stops when we reach Object or the end of ancestors tree.
          constant = constant.ancestors.inject(constant) do |const, ancestor|
            break const    if ancestor == Object
            break ancestor if ancestor.const_defined?(name, false)
            const
          end

          # owner is in Object, so raise
          constant.const_get(name, false)
        end
      end
    end

    def deep_symbolize_keys(hash)
      deep_transform_keys_in_object(hash) { |key| key.to_sym rescue key }
    end

    private

    def deep_transform_keys_in_object(object, &block)
      case object
      when Hash
        object.each_with_object({}) do |(key, value), result|
          result[yield(key)] = deep_transform_keys_in_object(value, &block)
        end
      when Array
        object.map {|e| deep_transform_keys_in_object(e, &block) }
      else
        object
      end
    end
  end
end

Version data entries

8 entries across 8 versions & 1 rubygems

Version	Path
beryl-0.3.1	lib/beryl/utils.rb
beryl-0.3.0	lib/beryl/utils.rb
beryl-0.2.5	lib/beryl/utils.rb
beryl-0.2.4	lib/beryl/utils.rb
beryl-0.2.3	lib/beryl/utils.rb
beryl-0.2.2	lib/beryl/utils.rb
beryl-0.2.1	lib/beryl/utils.rb
beryl-0.2.0	lib/beryl/utils.rb